            "platform_ln" [coll15]
            ;; - characteristic name
            "char1" [coll11]
+           "char2" [coll11]
+           "char1 char2" [coll11]
            ;; - chracteristic description
            "char1desc" [coll11]
+           "char2desc" [coll11]
+           "char1desc char2desc" [coll11]
 
            ;; Instruments
            ;; - short name


           ;; Checking specific fields

           ;; provier
           "PROV1" [coll1 coll2 coll3 coll23]

           ;; entry title

        psa4 (dc/psa "case" :string "up")
        p1 (dc/platform "platform_SnB" "platform_Ln B" nil
                        (dc/instrument "isnA" "ilnA"
                                       (dc/sensor "ssnA" "slnA")
                                       (dc/sensor "ssnD" "slnD" "techniqueD")))
        p2 (dc/platform "platform_SnA spoonA" "platform_LnA"
                        [(dc/characteristic "char1" "char1desc")
                         (dc/characteristic "char2" "char2desc")]
                        (dc/instrument "isnB" "ilnB"
                                       (dc/sensor "ssnB" "slnB" "techniqueB")
                                       (dc/sensor "ssnC" "slnC" "techniqueC")))
        p3 (dc/platform "spoonA")
        pr1 (dc/projects "project-short-name")
        sk1 (dc/science-keyword {:category "Cat1"
